Gigaset DE700 IP PRO / en / A31008-M2211-R101-5-7619 / glossary.fm / 13.09.2012
PRO Version 3, 30.05.2012
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Glossary
RTCP
Real-Time Control Protocol
Is used to control the RTP protocol. The RTCP protocol is a control protocol and therefore
knows which of the transferred RTP sessions belong together.
RTCP port
(Local) port by means of which voice data packets are sent and received for VoIP.
RTP
Real-Time Transport Protocol
Global standard for transferring audio and video data. Often used in conjunction with UDP.
In this case, RTP packets are embedded in UDP packets.
S
Server
Makes a service available to other network subscribers (clients). The term can indicate a
computer/PC or an application. A server is addressed via the IP address/domain name
and port.
SIP (Session Initiation Protocol)
Signalling protocol independent of voice communication. Used for establishing and end-
ing a call. It is also possible to define parameters for voice transmission.
SIP address
See URI.
SIP port/Local SIP port
(Local) port by means of which SIP signalling data is sent and received for VoIP.
SIP provider
See VoIP provider.
SIP proxy server
IP address of your VoIP provider's gateway server.
Static IP address
See Fixed IP address.
STUN
Simple Transversal of UDP over NAT
NAT control mechanism.
STUN is a data protocol for VoIP telephones. STUN replaces the private IP address in the
VoIP telephone data packets with the public address of the secure private network. To con-
trol data transfer, a STUN server is also required on the Internet. STUN cannot be imple-
mented with symmetric NATs.
See also: ALG, Firewall, NAT, Outbound proxy.
Subnet
Segment of a network.
